Bramble

Bramble is the tenth letter of the Gaelic tree alphabet, representing M - in old Gaelic it was Muin and in modern Gaelic it is Dreas. Muin also translates as 'vine', and so it appears in many versions of the alphabet, but as grape vines have never grown wild in Scotland, as muin is one of the old Gaelic words for bramble and as brambles make excellent wine, we deduce this is what was really intended!